Adjustable frequency synthesizer

摘要: A phase-locked-loop frequency synthesizer with adjustable has a signal source of predetermined reference 10, 100 or 1,000 Hz, and comparator first input receiving the signal, second divided frequency, an output producing dependent on difference between equality signal. The operates to adjust increased produced by oscillator in such manner as equalize frequencies also voltage controlled produce frequency. divider divides derived from at output, blanking circuit remove number pulses per whose is divider, selector provided for adjustably selecting be removed circuit.